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<Title>Background and Wallpaper</Title>
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<p class="heading0">ChartDirector 7.0 (Java Edition)</p>
<p class="heading1">Background and Wallpaper</p>
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<img src="images/background0.png" width='270' height='270'>&nbsp;&nbsp;<img src="images/background1.png" width='270' height='270'>&nbsp;&nbsp;<img src="images/background2.png" width='270' height='270'>&nbsp;&nbsp;<img src="images/background3.png" width='270' height='270'>
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This example demonstrates some of the background effects supported by ChartDirector.<br><br>
ChartDirector supports using an image file as the wallpaper of the chart image background with <a href="BaseChart.setWallpaper.htm">BaseChart.setWallpaper</a>, and as the plot area background with <a href="PlotArea.setBackground2.htm">PlotArea.setBackground2</a>.<br><br>
In addition to wallpapers, ChartDirector supports alternating plot area background colors using <a href="PlotArea.setBackground.htm">PlotArea.setBackground</a> and <a href="PlotArea.setAltBgColor.htm">PlotArea.setAltBgColor</a>.<br><br>
You can switch the default colors to using a dark background with white lines and text in one step by changing the color palette to a <a href="Chart.whiteOnBlackPalette.htm">whiteOnBlackPalette</a> using <a href="BaseChart.setColors.htm">BaseChart.setColors</a>.
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<p class="heading1a">Source Code Listing</p>
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<b>[JSP Version]</b> jspdemo/background.jsp
<div class='codeblock'><code class='pre'>&lt;%@page import="ChartDirector.*, java.util.*" %&gt;
&lt;%!
// Function to create the demo charts
void createChart(WebChartViewer viewer, int chartIndex)
{
    // The data for the chart
    double[] data = {85, 156, 179.5, 211, 123};
    String[] labels = {"Mon", "Tue", "Wed", "Thu", "Fri"};

    // Create a XYChart object of size 270 x 270 pixels
    XYChart c = new XYChart(270, 270);

    // Set the plot area at (40, 32) and of size 200 x 200 pixels
    PlotArea plotarea = c.setPlotArea(40, 32, 200, 200);

    // Set the background style based on the input parameter
    if (chartIndex == 0) {
        // Has wallpaper image
        c.setWallpaper("tile.png");
    } else if (chartIndex == 1) {
        // Use a background image as the plot area background
        plotarea.setBackground2("bg.png");
    } else if (chartIndex == 2) {
        // Use white (0xffffff) and grey (0xe0e0e0) as two alternate plotarea background colors
        plotarea.setBackground(0xffffff, 0xe0e0e0);
    } else {
        // Use a dark background palette
        c.setColors(Chart.whiteOnBlackPalette);
    }

    // Set the labels on the x axis
    c.xAxis().setLabels(labels);

    // Add a color bar layer using the given data. Use a 1 pixel 3D border for the bars.
    c.addBarLayer3(data).setBorderColor(-1, 1);

    // Output the chart
    viewer.setChart(c, Chart.SVG);

    // Include tool tip for the chart
    viewer.setImageMap(c.getHTMLImageMap("", "", "title='Revenue for {xLabel}: US${value}K'"));
}
%&gt;
&lt;%
// This example includes 4 charts
WebChartViewer[] viewers = new WebChartViewer[4];
for (int i = 0; i &lt; viewers.length; ++i) {
    viewers[i] = new WebChartViewer(request, "chart" + i);
    createChart(viewers[i], i);
}
%&gt;
&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
    &lt;title&gt;Background and Wallpaper&lt;/title&gt;
    &lt;!-- Include ChartDirector Javascript Library to support chart interactions --&gt;
    &lt;script type="text/javascript" src="cdjcv.js"&gt;&lt;/script&gt;
&lt;/head&gt;
&lt;body style="margin:5px 0px 0px 5px"&gt;
    &lt;div style="font:bold 18pt verdana;"&gt;
        Background and Wallpaper
    &lt;/div&gt;
    &lt;hr style="border:solid 1px #000080; background:#000080" /&gt;
    &lt;div style="font:10pt verdana; margin-bottom:1.5em"&gt;
        &lt;a href="viewsource.jsp?file=&lt;%=request.getServletPath()%&gt;"&gt;View Source Code&lt;/a&gt;
    &lt;/div&gt;
    &lt;!-- ****** Here are the chart images ****** --&gt;
    &lt;%
        for (int i = 0; i &lt; viewers.length; ++i) {
            out.write(viewers[i].renderHTML(response));
            out.write(" ");
        }
    %&gt;
&lt;/body&gt;
&lt;/html&gt;</code></div>
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<br><hr class="separator"><div class="copyright">&copy; 2022 Advanced Software Engineering Limited. All rights reserved.</div>
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